Alar ms



Y such doors self-closing.

PATENT 4rrrca@ JH`P. EVER/PZ, OF'- SAN FRANCISCO, CALIFORNIA.

imeaofvelvism in.suuciLAR-f,MARme Specification forming part of Letters`PatentNo. 184,705, dated November 28, 1876; application filed iSeptember 26, 1876.

To all wlw-m lit may concern Be it know-n that. I, JOHN P..` Ev-Earrz, aresident ot? the city and county of San Francisco, State of California,have invented ay vdoor by an adjusted spr'ln g on its release; also,

by additional mechanism, fitted either tothis door or to any part of abuilding in which this door may be placed. This alarm may be rung in theusual manner by hand; the-object of my invention being to causetheopening of ofce or other doors to automatically give an alarm, soasto be serviceable for business pur-r poses, or to prevent burglaries,85e., andto make This. I accomplish by fastening to that part ofthehinge fitted to the door-frame a box containing a drum, with springadjusted by a keytothe proper tension, by said drum.` being providedwith teeth which gear into a worm or its equivalent. To the rim of aneccentric attachmentvon this drum a chain is fastened, so as to besecured to the' other hinge-Hap, tted tol the doory itseltby an eyeprovided on a curved folding piece in such manner that'as the door isopened this chain will gradually leave the eccentric rim, and follow agroove arranged therefor on this folding piece attachedto the door-flap,while said piece. by bending into various angles on emerging from thisbox, in order to adapt itselfl to the several positions required, allowsof the chain being retained on it, and withdrawn also from the box tothe full extent the door is opened, thus insuring the entire force ofthe adjusted spring Within the drum for automatically closing the door.For ringing the bell while the door is thus being opened, a disk,provided with one or more catches or pins, is adjusted outside of thebox into any position required on the projecting spindle of thisspringdrum. These catches, on the revolution ofthe drum, actuate acompound lever, governed by a spring, to which lever a bellhammer, forstriking a xed gong or bell, is attached also, to this lever a slidingknob is tted, so that by adjusting such knob and leverthe disk, providedwith catch-pins, may ,i revolvewithout coming in contact therewith be`rung by acrank-handle, fitted witn a cam,

soasto.. engage a slidingv plate to which the last connection is made;and this arrangement may either be secured to thecenter ot' the dooritself, ory to any part of a building in which such door may be placed.4f

Figure 1 isa front view, or vertical longitudinal elevation, of thecombined door-hinge and alarm-bell, with crank attachment andconnections, cmbodying my invention, wherein the position of themechanism about to strike an alarm is show-n in dotted lines, the doorbeingV supposed partiallyopen, Fig. 2 is a rear vertical elevation ofFig. 1 `with box-plate removed, so as vto exhibit the interior details.Fig. 3 is a plan of the same with top removed.v

With. reference to the drawings, fitted to. one flap, H, of an ordinarydoor-hinge by screws q g, Within this box B is a drum, D, containing aspiral spring,v S, and on the outer rim of this drum D are teeth d,which gear into a worm, W, this drum, spring, and worm being so arrangedthat, by round in a positive direction of the projecting spindle s ofthis worm, the spring S may be wound up and adjusted tothe desiredtension. C is au eccentric cam or arm, attached to the drum D, and lonthis cam a chain or rope, B, is secured at one end, so as to fit to therim o of this cam. The other end of this chain Ris fastened to an eye,c, fitted to a curved me f tallic'piece, P, which consists of two arms,pp', jined together by a knuckle-joint, and arranged to double andfold uponto one another when made to assume various positions within this boxB. This folding piece P is provided WithA a groove, g, for receiving andretaining the chain R, and with a head, K, for its adjustment by a pin,G, to an aperture provided for it in the door-hingelap El', so that asthe door is pushed open this folding piece P from being partiallydoubled up will gradually be withdrawn from the box, and assume the formof acontinuouscurve, with the chain R resting within its groove g, whilethis chain R B is a box,` I

the turning e i xsane l the full force to which this spring has beenadjusted onthe release ot' the same. On the Y, outer plate ot' the boxB, and onthe projecting threaded portion of the spindle h of the, drumD, a disk, A, is adjusted by a nut, n. This disk is provided with ormore projecting pin-catches, m1 m2, so arranged as to meet the end a ofa lever, L, fitted by a pin, z, to an other 1ever,N, pivoted at y, andcarrying an ordinary bell-hammer, O, for "the purpose of striking a gongor bell, Q, adjusted to a bracket, fr, on this outer plate of the box Bby a nut t'. This compound'lever L N is governed in its movements whenactuated by the revolution ofthe disk carrying the pins m1 m2, by aspring, F, titted between pins f f', and press- 'ing near the stop endofthe lever L; and the hammer-lever N is limited in its'upward movementby a pin-stop, By this arrangement, when a door fitted with thisattachment is opened, as described, the pin m1 may be made toimmediately actnate the hammer on the i gong, or may be so `adjusted asto allow of the door being about half opened before sounding an alarm,and the second pin m2, onvfollowing, may be. also made to give a secondring when the door is about half or fully opened, as may be desiredalso, for the guidance ot' the folding-piece P, withchain attachment R,in its movement on entering or emerging from the box B, a tixed pin, k,is arranged in a suitai ble position on the top cover of the box.

For allowing of an alarm being sounded by a centrally-placedcrank-handle attachment to the door, such as is now in general use, orfor making a connection to this bell mechanism from one or more rooms ina building, a knob, T, provided with a slotted slide-piece, b, formingtogether a latch, is attached to the lever L, so as to slide on and litto a pin, u, fixed to the outer box-plate. To this knob T ordinary hell.

wire connections and bent levers w 'w1 are fastened, and also secured tosuch parts of a buildin g as may be necessary, the last connection beingattached to a slotted plate, J, pro.

` lever L N, with spring vided with tooth'j, and arranged to slidedownward within a frame, M, when actuated by a cam, c, tted to thespindle of l such crank` attachment X, engaging this tooth j, and, toreturn or slide upward by the return action of the spring F on the`lever L 'and latch T b.

For silencing the bell, while still preserving the full force ot' theadjusted spring `Si for closing the door, the latch T bis presseddownward, `so as `to throw the lower portion of the lever L out of theway of the pin-catches ml m2;

I claim as my invention- Y 1. The combined door-hinge and alarm-belldescribed, consisting ofthe toothed drumD d, with adjustable spring S,worm W s, or its equivalent, cam-arm C, and folding piece l?, tted tothe door-hinge ap H', and provided with connection R to the cam C; also,the guidepin k, adjustable disk A,`provided` with catchpins m1 m2, and.fittedto the projecting .drnmf spindle h, arranged for actuating thecombined F, and hammer O for striking the fixed gongQ, as herein shownand constructed, substantially as and for the "purt poses hereinsettforth and specified.

2. The drumeD d, provided with spring S, arm C, and adjusting-worm `W s,or itsequivaient, tted to a door-frame by hinge-hap H, in combinationwith a door-hinge tlap, H', pro,- vided with folding piece P, or itsequivalent, and drum-connection R, substantially asand for the purposesherein set forth and specilied. l 3. The stop knob and slide T b, fitted.tothe fixed pin u on the box B, in combination with the lever L l,spring F, and hammer-lever N, l substantially as and for the purposesherein set forth and specified.

4. The knob-slide T b, attached to the lever L N, fitted with hammer OJand connected ,i by wire connections w fw to the sliding slotted plate Jj, in combination with the handle, titted with cam X c, spring F, andfixed gong Q, all arranged as herein shown and set fortis,

substantially as and for the purposes specified.

i JOHN RIEER'ITZ.`

Witnesses:

JOHN HAMILL, LIONEL VARICAS.

